CN100510852C - Liquid crystal display module test system - Google Patents
Liquid crystal display module test system Download PDFInfo
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- CN100510852C CN100510852C CNB2006100356685A CN200610035668A CN100510852C CN 100510852 C CN100510852 C CN 100510852C CN B2006100356685 A CNB2006100356685 A CN B2006100356685A CN 200610035668 A CN200610035668 A CN 200610035668A CN 100510852 C CN100510852 C CN 100510852C
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Abstract
The invention discloses a testing system for LCD module. The testing control circuit comprises USB interface, microcontroller with firmware and CPLD with interfaces corresponding to interfaces of tested LCM. The tested LCM is initialized by user in application software from testing PC. CPLD decodes data sent to microcontroller though USB interface for PC. Corresponding data format drive LCMs are formed aiming at different LCMs and different working models of LCMs respectively. Movies or images with corresponding format are displayed on LCD screen and intuitionistic comparison is carried out as movies or images with the same format, used as comparison reference in PC are displayed. It can test all working model comprising high-speed working model. Only initialization value is changed by application software and there is no need to change testing control circuit. The invention can be widely applied in testing and debugging technological parameters of multiple LCMs, such as TFT and CSTN so on, and LCM demonstration and application device.
Description
Technical field
The present invention relates to the test of LCD MODULE, especially relate to a kind of liquid crystal display module test system.
Background technology
LCD MODULE (LCD Module, be called for short LCD) be a kind of assembly that liquid crystal display device, web member, integrated circuit, PCB wiring board, backlight, structural member are assembled together, the LCD MODULE that the present invention relates to mainly is meant the dot matrix lcd module by the assembling of lattice lcd display spare.It is the high speed operation pattern that the chip for driving of TFT screen generally has system interface mode of operation, RGB Interface pattern and VSYNC Interface pattern; The chip for driving of CSTN screen does not have the RGBInterface pattern.The proving installation of existing dot matrix lcd module is that control signal and data are all from single-chip microcomputer based on 51 single-chip microcomputers at present mostly.Generally can only test certain mode of operation of a kind of LCD MODULE, versatility is poor, it is very not convenient to use, and the read only memory ROM of 51 single-chip microcomputers is limited, when debugging the LCD MODULE technical parameter at every turn, revised program also must be gone into singlechip chip with the HEX file programming of preserving the single-chip microcomputer program codes, operation steps is many, and efficient is low, and especially data rate is slow, be lower than the speed that chip for driving can be born, can not test the high speed operation pattern of LCD MODULE.
Summary of the invention
Technical matters to be solved by this invention is the defective that remedies prior art, and a kind of liquid crystal display module test system that adopts USB interface with the multiple mode of operation of efficient test plurality of liquid crystals display module is provided.This liquid crystal display module test system is by being provided with and each register value of LCD chip for driving of changing tested LCD MODULE, can comprise that the multiple mode of operation of high speed operation pattern sets and switch to tested LCD MODULE, can also be at the video files or the picture file that show the setting form of playing on the PC on the LCD synchronously, so that observe intuitively and the lcd driver technical parameter of debugging LCD MODULE.
Technical matters of the present invention is achieved by the following technical programs.
This liquid crystal display module test system, comprise the test control circuit of test with PC and the tested LCD MODULE work of driving that links to each other with described PC, described test is provided with the driver that can discern test control circuit with PC, and provide application programming interface (ApplicationProgramming Interface is called for short api function) to call to application software.
The characteristics of this liquid crystal display module test system are:
Described test control circuit is provided with USB interface (Universal Serial Bus, the abbreviation of USB (universal serial bus)), by its data that power supply are provided and transmit PC to described test control circuit.
Described test control circuit is provided with the microcontroller MCU that is loaded with firmware, and have a CPLD (ComplexProgrammable Logic Device with the corresponding connected interface of tested LCD MODULE interface, be called for short CPLD), described microcontroller MCU links to each other with described USB interface, the PB of described complex programmable logic device (CPLD) and described microcontroller, the PD data transmission port links to each other, PC is decoded by the data that USB interface is sent to microcontroller, different working modes corresponding to different LCD MODULE and LCD MODULE forms corresponding data layout driving LCD MODULE respectively, shows the video display or the picture of corresponding format on the LCD screen;
With the application software on the PC initialization value of tested LCD MODULE is delivered to by test by the user in the corresponding registers of LCD chip for driving of LCD MODULE, makes its initialization.
Technical matters of the present invention is achieved by following further technical scheme.
The peripheral circuit of described microcontroller MCU comprises coupled respectively E
2PROM, power-switching circuit, reset circuit, wake-up circuit and crystal oscillating circuit, described power-switching circuit also link to each other with USB interface, complex programmable logic device (CPLD) and tested LCD MODULE interface respectively.
The firmware of described microcontroller MCU is after microcontroller MCU is Default device by USB interface identification PC, automatically from E
2The program of downloading among the PROM, it finishes the initialization of microcontroller MCU by TD_Init () function, also sets up transmission mode by TD_Poll () function, is used for the enumeration test control circuit, the operating means that is PC is discerned, and sets up the passage of transmission data.
The firmware of described microcontroller MCU comprises that mainly device descriptor table, Task Distribution, device request and USB interrupt, and wherein Task Distribution is an emphasis.
The described transmission mode of setting up by TD_Poll () function is the GPIF fifo mode.
Described microcontroller MCU is the CY7C series control chip of integration USB 2.0 interfaces of U.S. Sai Pulasi company product, and the firmware that it is loaded with is write by the basic structure that U.S. Sai Pulasi company provides.
The corresponding interface that links to each other that described complex programmable logic device (CPLD) has with tested LCD MODULE interface, comprise at least 42 I/O mouths, wherein 16 I/O mouths are as the data line of LCD MODULE, and other I/O mouth is as the control line of LCD MODULE.
Described complex programmable logic device (CPLD) is the single-chip microcomputer programmable peripheral chip PSD that has JTAG (abbreviation of the JointTest Action Group of combined testing action group) interface.
Described test converts video files or picture file respectively to the data of corresponding format with the application software on the PC, USB interface by PC is sent to test control circuit, control circuit is handled and is sent to the interface that is connected with the LCD chip for driving after tested again, the LCD chip for driving of control LCD MODULE, the video display or the picture of demonstration corresponding format on the LCD screen.
Described video files is the video files of AVI form.
Described picture file is the picture file of BMP form.
System of the present invention contrasts with the device of existing test LCD MODULE technical parameter, has following beneficial effect:
(1) directly perceived: system of the present invention can show synchronously on the LCD screen that the usefulness that play on the PC makes comparisons with reference to the video display or the picture file of the corresponding format of part, and the video display or the picture file of corresponding same format in the LCD MODULE demonstration with certain technical parameter of being tested compare respectively intuitively.
(2) needn't change test control circuit to different LCD MODULE: system of the present invention passes through the lcd driver chip initiation of the application software of PC to LCD MODULE, select mode of operation, the interface of selection is provided by described application software, the scope of selecting comprises all working pattern that LCD MODULE may have, test the different working modes of different LCD MODULE or LCD MODULE and the test of adjusting the LCD MODULE technical parameter, only need be by the initialization value of described application software change LCD chip for driving corresponding registers, the mode of operation of LCD chip for driving and technical parameter will change, and needn't change test control circuit, test control circuit just provides the necessary condition of work and the USB interface of transmission data for LCD MODULE.
(3) can test the high speed operation pattern of LCD MODULE: the high speed operation pattern test of LCD MODULE need be to the LCD of LCD MODULE chip for driving high speed transmission data, with the high speed limit of test chip.The passage of system transmissions data of the present invention adopts USB interface, and the speed of USB2.0 interface transmission data is higher than the speed that chip for driving can be born up to 480Mbits/s, therefore, can test the high speed operation pattern of LCD MODULE.
In a word, system of the present invention can show synchronously that the usefulness of playing on the PC makes comparisons with reference to the video display or the picture of the same format of part, compare intuitively, can test all working pattern that comprises the high speed operation pattern, only the initialization value of LCD chip for driving corresponding registers need be changed, and test control circuit needn't be changed by application software.System of the present invention can be widely used in the technical parameter of test and plurality of liquid crystals display modules such as debugging TFT, CSTN, and the demonstration application device of LCD MODULE.
Description of drawings
Below the contrast accompanying drawing and in conjunction with embodiment the present invention is further illustrated.
Fig. 1 is the composition block scheme of the specific embodiment of the invention;
Fig. 2 is the test control circuit block scheme of the specific embodiment of the invention;
Fig. 3 is the E among Fig. 2
2The PROM circuit diagram;
Fig. 4 is the reset circuit figure among Fig. 2;
Fig. 5 is the wake-up circuit figure among Fig. 2;
Fig. 6 is the power-switching circuit figure among Fig. 2.
Embodiment
A kind of liquid crystal display module test system that adopts USB interface
The TFT LCD chip for driving of tested LCD MODULE is set at the PXC3009 chip of the 262K look of Pixel Chips company product.This is a kind of single-chip of the TFT of aiming at liquid crystal display modular design, integrated complete source and gate driver, display screen clock figure RAM, DC-to-dc feed circuit, VCOM and Gamma impact damper, MCU interface and the RC oscillator etc. of controller, single frames data.
The liquid crystal display module test system of employing USB interface 4 as shown in Figure 1, 2, comprise that test is with PC 1 and the test control circuit 2 of working with the tested LCD MODULE of the driving that links to each other 3, described test is provided with the driver that can discern test control circuit 2 with PC 1, and provide the application programming interface api function to call to application software, power supply is provided and transmits the data of PC to test control circuit 2 by USB interface 4.
With the application software on the PC 1 initialization value of tested LCD MODULE 3 is delivered to by test by the user in the corresponding registers of LCD chip for driving of LCD MODULE 3, makes its initialization.
The peripheral circuit of microcontroller MCU 5 comprises coupled respectively E
2PROM 7, power-switching circuit 8, reset circuit 9, wake-up circuit 10 and crystal oscillating circuit 11, power-switching circuit 11 also link to each other with USB interface 4, complex programmable logic device (CPLD) 6 and tested LCD MODULE 3 interfaces respectively.Microcontroller MCU 5 has PA, PC and PE control port and PB, PD data transmission port.
The firmware of microcontroller MCU 5 is after microcontroller MCU 5 is Default device by USB interface 4 identification PCs 1, automatically from E
2The program of downloading among the PROM 7, it finishes the initialization of microcontroller MCU 5 by TD_Init () function, also sets up transmission mode by TD_Poll () function, is used for the enumeration test control circuit, the operating means that is PC 1 is discerned, and sets up the passage of transmission data.The firmware of microcontroller MCU5 comprises that mainly device descriptor table, Task Distribution, device request and USB interrupt, and wherein Task Distribution is an emphasis.The transmission mode of setting up by TD_Poll () function is the GPIF fifo mode.
Microcontroller MCU 5 adopts the CY7C series control chip of integration USB 2.0 interfaces of U.S. Sai Pulasi company product, and the firmware that it is loaded with is write by the basic structure that U.S. Sai Pulasi company provides.
The model that complex programmable logic device (CPLD) 6 adopts XILINX company to produce is the single-chip microcomputer programmable peripheral chip PSD of the band jtag interface 12 of XC9536.Jtag interface is 4 lines: TMS, TCK, TDI, TDO, is respectively model selection, clock, data input and DOL Data Output Line.
E as shown in Figure 3
2The 24 serial I2C chip 24LC64 that PROM 7 adopts Microchip company to produce.
The model that power-switching circuit 8 as shown in Figure 4 adopts RichTek company to produce is the switch lowering and stabilizing blood pressure device of RT9162, and the 5V voltage step-down that it provides USB interface 4 is needed operating voltage 3.3V.
Microcontroller MCU 5 carries out electrification reset by reset circuit shown in Figure 59, enumerates to PC 1 by USB interface 4 then, and identification PC 1 is the Default device of Cypress company, and automatically from E shown in Figure 6
2Download firmware among the PROM 7, download finish after, the microcontroller MCU5 firmware that brings into operation, test control circuit 2 is enumerated again, makes PC 1 operating means be identified as user-defined equipment again, reloads user-defined driver.Firmware initialization simultaneously microcontroller MCU 5 makes it set up certain data transfer mode.
When no datat was transmitted, microcontroller MCU 5 entered suspended state, and to reduce the power consumption of test control circuit 2, when data transmission was arranged, microcontroller MCU 5 returned to normal duty by wake-up circuit shown in Figure 6 10 from suspended state.
The corresponding interface that links to each other of complex programmable logic device (CPLD) 6 LCD MODULE 3 interfaces that have and tested, comprise at least 42 I/O mouths, wherein 16 I/O mouths are as the data line of LCD MODULE 3, and other I/O mouth is as the control line of LCD MODULE 3.
The course of work of this embodiment is as follows:
At first with data-interface, the control interface of apparatus of the present invention test control circuit 2, be connected with data-interface, the control interface of tested LCD MODULE 3 respectively, again test control circuit 2 is connected to USB interface 4, power supply is provided and transmits the data of PC 1 to test control circuit 2, LCD MODULE 3 by USB interface 4, test control circuit 2 is finished enumerating of equipment at powered on moment, operating means on the PC 1 is discerned automatically, load driver, finishes being connected of physical connection that software and test control device communicate by letter and communication protocol.Carry out re-enumeration behind test control circuit 2 loading firmwares, this moment, test control circuit 2 was in normal operating conditions.
Then move the application software of PC 1, application software is searched corresponding apparatus earlier, finish the handle of discerning and obtain equipment again to equipment in the part, then the initialization value of tested LCD MODULE 3 is delivered to the application software on the PC 1 by test in the corresponding registers of LCD chip for driving of LCD MODULE 3 by the user, make its initialization, and select the mode of operation of LCD chip for driving and technical parameter to be tested, for example the Gamma value of display screen processing color shade scope is a contrast factor.
Application software is converted to AVI video files or the BMP picture file that LCD MODULE 3 requires respectively with video files or picture file, on PC 1, show preview for the user, determine to select whether video display or image data are sent to LCD MODULE 3 by the user, if select be, data are sent to test control circuit 2 by the USB interface of PC 1, control circuit 2 is handled and is sent to the interface that is connected with the lcd driver chip after tested again, the LCD chip for driving of control LCD MODULE 3, on the LCD screen, show AVI video display or BMP picture synchronously, the user can compare with AVI video display or the BMP picture on the PC 1, and technical parameter that Direct observation reflecting liquid crystal display module 3 is tested such as Gamma value are to changing displayed image brightness, the effect of color harmony gray scale.So far finish test operation one time.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (10)
1, a kind of liquid crystal display module test system, comprise that test is with the test control circuit of PC with the tested LCD MODULE work of driving that links to each other with PC with described test, described test is provided with the driver that can discern test control circuit with PC, and provide application programming interface to call to application software, it is characterized in that:
Described test control circuit is provided with USB interface, by its data that power supply are provided and transmit PC to described test control circuit;
Described test control circuit is provided with the microcontroller that is loaded with firmware, and have a CPLD with the corresponding connected interface of tested LCD MODULE interface, described microcontroller links to each other with described USB interface, the PB of described CPLD and described microcontroller, the PD data transmission port links to each other, PC is decoded by the data that USB interface is sent to microcontroller, different working modes corresponding to different LCD MODULE and LCD MODULE forms corresponding data layout driving LCD MODULE respectively, shows the video display or the picture of corresponding format on the LCD screen;
With the application software on the PC initialization value of tested LCD MODULE is delivered to by test by the user in the corresponding registers of LCD chip for driving of LCD MODULE, makes its initialization.
2, liquid crystal display module test system according to claim 1 is characterized in that:
The peripheral circuit of described microcontroller comprises coupled respectively E2PROM, power-switching circuit, reset circuit, wake-up circuit and crystal oscillating circuit, and described power-switching circuit also links to each other with USB interface, CPLD and tested LCD MODULE interface respectively.
3, liquid crystal display module test system according to claim 1 and 2 is characterized in that:
The firmware of described microcontroller is after microcontroller is Default device by USB interface identification PC, the automatic program of from E2PROM, downloading, it finishes the initialization of microcontroller by TD_Init () function, also set up transmission mode by TD_Poll () function, be used for the enumeration test control circuit, the operating means that is PC is discerned, and sets up the passage of transmission data.
4, liquid crystal display module test system according to claim 3 is characterized in that:
The firmware of described microcontroller comprises that mainly device descriptor table, Task Distribution, device request and USB interrupt.
5. liquid crystal display module test system according to claim 4 is characterized in that:
The described transmission mode of setting up by TD_Poll () function is the GPIF fifo mode.
6, liquid crystal display module test system according to claim 5 is characterized in that:
Described microcontroller is the CY7C series control chip of integration USB 2.0 interfaces of U.S. Sai Pulasi company product, and the firmware that it is loaded with is write by the basic structure that U.S. Sai Pulasi company provides.
7, liquid crystal display module test system according to claim 6 is characterized in that:
The corresponding interface that links to each other that described CPLD has with tested LCD MODULE interface, comprise at least 42 I/O mouths, wherein 16 I/O mouths are as the data line of LCD MODULE, and other I/O mouth is as the control line of LCD MODULE.
8. liquid crystal display module test system according to claim 7 is characterized in that:
Described CPLD is the single-chip microcomputer programmable peripheral chip PSD that has jtag interface.
9, liquid crystal display module test system according to claim 8 is characterized in that:
Described test converts video files or picture file respectively to the data of corresponding format with the application software on the PC, USB interface by PC is sent to test control circuit, control circuit is handled and is sent to the interface that is connected with the LCD chip for driving after tested again, the LCD chip for driving of control LCD MODULE, the video display or the picture of demonstration corresponding format on the LCD screen.
10. liquid crystal display module test system according to claim 9 is characterized in that:
Described video files is the video files of AVI form;
Described picture file is the picture file of BMP form.
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| CNB2006100356685A CN100510852C (en) | 2006-05-22 | 2006-05-22 | Liquid crystal display module test system |
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| CNB2006100356685A CN100510852C (en) | 2006-05-22 | 2006-05-22 | Liquid crystal display module test system |
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| CN100510852C true CN100510852C (en) | 2009-07-08 |
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| CN101739922B (en) * | 2008-11-24 | 2011-09-14 | 英业达股份有限公司 | System and method for detecting color data of display |
| CN101770088B (en) * | 2008-12-26 | 2011-12-28 | 京东方科技集团股份有限公司 | liquid crystal display module testing device and data transmission method thereof |
| CN101770089B (en) * | 2008-12-26 | 2012-03-07 | 京东方科技集团股份有限公司 | Liquid crystal display module tester |
| CN102446476A (en) * | 2011-11-02 | 2012-05-09 | 苏州华兴源创电子科技有限公司 | Small and medium-sized liquid crystal module checking machine |
| CN102654964B (en) * | 2012-05-08 | 2016-04-06 | 深圳同兴达科技股份有限公司 | The programmable gate array test plate of liquid crystal display and programmable gate array test system |
| CN103523620B (en) * | 2012-06-28 | 2016-02-24 | 株式会社日立建筑系统 | Display device of elevator |
| CN103105684B (en) * | 2013-01-22 | 2015-09-16 | 北京京东方光电科技有限公司 | LCD MODULE method of testing, device, system and testing apparatus |
| CN105590525A (en) * | 2016-02-24 | 2016-05-18 | 成都极地科技有限公司 | Simulation training radio station |
| CN106710496A (en) * | 2017-01-18 | 2017-05-24 | 深圳市视显光电技术有限公司 | Device and method for online debugging of parameters of LCD logic board |
| WO2019056352A1 (en) * | 2017-09-25 | 2019-03-28 | 深圳传音通讯有限公司 | Debugging system for debugging lcm parameter in real time on low-version android platform, and method therefor |
| WO2019061049A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳传音通讯有限公司 | System and method for debugging driver of liquid crystal display module |
| CN107677166B (en) * | 2017-11-22 | 2023-09-12 | 中国工程物理研究院电子工程研究所 | Full-electronic trigger fuze tester and testing method thereof |
| CN108492756A (en) * | 2018-03-21 | 2018-09-04 | 武汉精测电子集团股份有限公司 | A kind of multichannel ID/TE detection devices and multichannel ID/TE detectors for liquid crystal module |
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